Comparative analysis and applicability of corrosion test methods for construction steel components

In this paper, a systematic study of different methods of manufacturing corroded components and their post-corrosion morphology has been carried out to verify the effectiveness of different accelerated corrosion testing methods. Corrosion tests were performed on specimens of construction steel Q345 by three corrosion methods, i.e., atmospheric exposure corrosion, salt spray accelerated corrosion, and accelerated electrochemical corrosion. The surface morphology of the specimens after corrosion was measured, the characteristics of the corrosion morphology development of the various corrosion methods of the components were analyzed, and the corresponding probability model of the corrosion morphology distribution was developed. Accordingly, a random corrosion surface modeling technique was developed based on the fast Fourier transform and two-dimensional digital filtering techniques, and the mechanical analysis of axially pressed components with different corrosion surfaces was carried out. The results indicate a clear difference in the undulation and variation pattern of the corroded surface under different corrosion methods. However, the disparity in the axial compression load capacity of the specimens under different surface conditions were minimal, was less than 1%. Therefore, the axial compression performance of corroded steel members can be studied using electrochemical corrosion and smooth corrosion surface simulation in the future study.